adding redirect_url to keen ruby gem
adding redirect_url to list of delegators
Fix redirect URL test
Update README and version
Standardize syntax example. Thanks Michelle!
Add EventMachine troubleshooting info
Update README with better Unicorn example
Set license in gemspec
Added support for grouping by multiple properties.

Now you can specify a group_by like :group_by => ["property_1", "property_2"]
https://keen.io/docs/data-analysis/group-by/#grouping-by-multiple-properties
Add support for scoped keys

Scoped keys are a way to provide limited read access to Keen collections
https://keen.io/docs/security/#scoped-key
Add test instructions to the Contributing section of README.
Update README.md
add line breaks for contributors section
Tell Travis not to run integration tests

Doing this for now, because the API is eventually consistent, and yet we don't want to add super long `sleeps` into the core test suite.
increase sleep before delete test from 3 to 10s
fix broken encoding test and test encoding more characters

  -broken test was expecting plus signs for collections with spaces
  -added more symbols to collection name testing
Fixed encoding method for event collections in URLs
Test encoder for even more characters
switch to Addressable for URI encoding
improve markdown for tests